Furnace



Mar. 6, 1923.

1,447,633. L. SHARP.

FURNACE.

um@ INVENTOR.

ATTORNEYS C. L. SHARP.

Mal". 6, 1923.

FUHNACE.

FILED ocT.2o. 1920.

2 SHEETS*SHEET 2.

j Iz u, 455555555 2 ma A 55555545/ la l.

INI/EN TOR.

A TTORNEYS' cnns'rnn L. snaar, or LANCASTER', oHIo; GEORGIA snr sain CHESTER L. SHARP, nncnnsnn Patented Mar. d, 19232..

l naif are taten latir anice. Y

ADMINISTRATRIX 0F scannen.

. Application filed October 20, 1920. Serial No. 418,141,

T40 all 'whom t may concern.' n

Be it known that I, CHESTER L. SHARP, a citizen of the United States, and a resident of Lancaster, in the lcounty of Fairlield and State of Ohio, have invented certain new and useful Improvements in Furnaces; and 1 do hereby declare the following to be a full` clear, and exact description of the invention, such as will enable others skilled in theart to which it appertains to make and use the same.

This invention relates to improvements in furnaces and more particularly to those of the muffler leertype such as are adapted for use in annealing glass aI'ticles,-one object o f the invention being to so construct the furnace as to provide side combustion chambers adapted for the use of raw or-clean producer gas, oil, natural gas or other fuels, and separated from the leer chamber; to obviate the use .of preheated air,` or natural gas or oil as fuel; to construct the furnace in such manner that uniform temperature throughout the leer chamber, above and below the leer pans or ware conveyor, shall be maintained; to provide means whereby the temperature within the munie or leer chamber may be increased or decreased as desired; so that the muiile or leer chamber may be increased or ..30

' ture may be increased or decreased at the f decreased as desired; so that the temperafront or rear of themuilie chamber, as desired, and to provide means for preheating theleer pans or ware conveyor before the glass articles are deposited.

A further object is to provide for the anhealing of glass articles in a mufHe leer fed' from side combustion chambers and to so construct the munies as to prevent breakage of the muiile tile which allows the gas and products of combustion, from escaping into the 'muiiie chamber.

With these and other objects in view, the invention consists in certain novel features of? construction and combinations of parts as hereinafter set forth and pointed out in the claims.

In the `accompanying drawings, Figure 14 is a longitudinal sectional view showing an embodiment of my invention; Figure 2 is a vertical transverse sectional view of the munie leer; Figures 3 and 4 are enlarged fragmentary sectional views taken at right angles to each other, of the muilie leer showing details of'construction of the same; Fign top 5 havingskew urei is a sectional view on the line 5-5 of Figure 2; Figure 6 is a section on the line 6' 6 of Figure 2, and Figure 7 is a sectional view on the line 7 7 of Figure 5. 1 represents aleer of the munie type having walls 2 and 3i; side walls 4 4; an arch abutments at its ends as at 6, against the 4side walls, and a bottoni 7 made in sections of tile and supported by girders, as at v8, supportedI atx their ends in the side walls 4, and the latter are suitably braced against strains by pairs of upright girders 9 having their upper ends connected by cross rods, as indicated at V10, extending over thearch top 5.

The leer structure above described contains a leer chamber 11 to be'lieated` and the side walls 12 of this chamber each comprises a plurality of solid tiles having tongue-andvgroove joints and each tile having a recessed inner face. The bottom 14 of the leer chamber comprises a plurality of lap- ]oint tiles having recessed upper facesy and the arch top 15 of the leer chamber comprises a plurality -of'tiles having tongue and groove' joints and lowei` receed faces. Skew backs 16 are provided at the upper ends of the side walls 12 for the arch top 15. Above the top or roof 15 of the leer chamber, an arch 17 is located and has skew abutments on the side walls 4 of the main leer structure and between the arches 15 and 17 muiiie asages are located as hereinafter explained The arch 17 is spaced from the crown or arch 5 so that the difference in the expansion between the fire clay of the latter and the fire brickl or tile of the arch 17 will be taken up in this space and will prevent leakage of the muie shapesa vA 'tunnel 18 communicates with the leer chamber 11 4fand throu h this tunnel and through said leer chamer, an endless conveyor v19 passes to carry the glass articles to be annealed. This conveyor passes over drums or wheels indicated at 20 and-21, said wheels or drums being so disposed and of such size that the lower munie nues will be located between vthe stretches of the conveyor and serve to heat the same before the articles to be treated are deposited thereon.

Located adjacent to eac-h side of the leer 1 are combustion chambers 22f22, to which producer gas may be supplied by burners E22a which receive the gas from a conduit 22h. The combustion chambers communilll) cate through passages 23 with mule passages 24 located between the bottom 14 of the leer chamber 11 and the Hoor 7 of the. leer structure and at respective sides of the center of said bottom, the mutlle pass-` ages 23 at one side of the center of bottom 14 being staggered with relation to those at the other side, and alternating with the inutile passages 24, are muile p'aages 25 which, at one side of the center ofthe bottom 14 are staggered with relation to the passages 25 at t-he other side.y The bottom mufiie passages 24 at each side-of the leer structure communicate with 'vertical mutie passages 26 between the side walls ot' the leer chamberand the side walls of the leer structure and said vertical passages 26 communicatewith muille passages 27 between the arch top l5 of the leer chamber and the arch 17. Alternating with the vertical passages 26 at each side of t-he structure are verticaly muiie passages 28 which communicate at their lower ends with the bottom muille passages 25 and at their upper ends withalternate top muilie passages 2.7. Valves '29 may be provided for Athe uptake passages 26 for a purpose hereinafter explained.

All of the bottom 'inutile passages 25' at respective sides of the center of the bottom of the leer chamber communicate with llues 30 and the latter communicates with stack 31, the structure v52 containing the extensions of the fines 30 leading. to the stack projecting beyond the leer structure and being disposed between the stretches of the conveyor as shown in Figure 1.

It will be seen that the loor 7 constitutglass articles for the r'eason that it throws a strain in the glass and it is impossible to properly anneal articles containing a' strain after it has passed out of the muflle chamber.

VBy extending the'loor 7 and ilues 30 to or beyond the stack, the defects above men-y tioned will be obviated.

The top of the tunnel 18 hereinbefore. referred to, may consist of a plurality of arches 18 and those arches from the stack to the discharging end of the leer may be provided with openings 158".y Every other arch is provided-with a small stack 18c in which slide valves 18d may be located.l The openings of the other arches may be covered the passa-ges 24, thence by the passages 26 to the passages 27; thence from the latter through the passage v28 to 'the bottom muiiepassages 25 and thence through. the iues 3() to the stack 31; Thus the heated products of .combustion flow in numerous streams around the leer chamber 11, in reverse directions through alternating muiile passages, and operate eectually and uni- 'ormly to heat the leer chamber and anneal the glass articles carried through the same by the conveyor.

As two separate exit iues 30 are provided and as the admission passages for products of combustion are equally` divided and spaced on both sides of the leer chamber, I am enabled by manipulation of the valves 29, to regulate the temperature of said chamber. Thus, should the temperature on one side of the leer chamber fall, greater draft on the products of combustion may `be induced by operating the valves 29 and thus the -proper and uniform temperature may be restored. Again, if the operator desires to throw the heat into the front or back part of the muie chamber, he may do so by operating the valves 29, or if one side is .running hotter than the other this canibe overcomeby operating the valves `29a inthe stack ue.

By my improvements, I am enabled to overcome the defects-and ob'ections to prior constructions employing ho ow tile involv- `ing the cracking and leaking of such tile and the consequent escape of gas `to the leer-chamber where a deposit on the'antic1es being annealed would result. Withmyconstruction as. hereinbefore described, .the use of hollow .tile is avoided andthe construction is such that adequate provision is made to allow for-l` expansion and contraction. Again, locationA of the .combustion .chambers at the sides of theleer structure, .ready ac- 120 -cess to the-burners is afforded.

It may be here stated that it is .not absolutely necessary to use cold Iair in .connection with `the combustion of I.the;producer gas. It desired, pre-heated air can be used 12'5 and obtain ood results.

Various c anges might'befmade in the'- details of construction of my invention with'- out departing from the spirit thereof or limiting its scope and hence I do not wish-to restrict myself to the precise details herein set forth.

Having fully described my invention what I claim as new and desire to secure by Letters Patent, is l 1. The combination with a muiiiey leen having a leer chamber and mutlie passages around the same, of combustion chambers communicating with respective sides of said muiile leer, one of said combustion chambers communicating with certain of said passages and the other combustion chamber communicating with others of said passages, and burners discharging into said combustion chambers.

The combination with a mufiie leer having a leer chamber and' two series 'of muiiie passages surrounding said chamber, of combustion chambers communicating with respective sides of said mulile leer, one of said combustion chambers vcommunicating with one series of muile passages and the other combustion chamber communicating with the other series of muiile passages, and burnrs discharging into said combustion cham- )elS- 3. The combination of a muiiie leer having a leer chamber andtwo series of muiie passages surrounding said chambers, the mutile passages of one series alternating with the muiiie passages of the other series, combustion chambers communicating with respective sides of said muie leer, one of said combustion chambers communicating with one of said series of muiile passages and the other combustion chamber communicating with the muille passages of the other series, and burners discharging into said combustion chambers.

4. The combination of a muiile leer having a leer chamber and two series of muifle passages surrounding the same,- valves in said passages, combustion chambers communicating with respective sides of said muille leer and communicatingl respectively with the respective series of muiiie passages, and burners discharging into said combustion chambers.

5. The combination of a muie leer having a leer chamber, an endless conveyor having its upper stretch passing throu h said chamber, said muilie leer having mu e passage surrounding'said chamber, certain of said muiile passages disposed between the stretches of said endless conveyor, combustion chambers for feeding products of 4combustion to said passages, and burners discharging into said combustion chambers.

6. The combination of a mule leer having a leer chamber and two series of muiiie passages surrounding said leer chamber, the passages of one series alternating with the passages of the other series, a separate combuston chamber communicating with the inlet ends of each series of passages, flues under the leer chamber communicating with the outlet ends of the muflle passages of the two series, and burners discharging into said combustion chambers. o

7. Thel combination of a muiiie leer having a leer chamber and muiile passages surrounding the same, combustion chamber for feeding products of combustion to the inlet ends of said passages, burners discharging into said combustion chambers, an endless conveyor having its upper stretch passing through the leer chamber, outlet tiues communicating with the outlet portions of said passages and extending beyond the inutile leer, the outlet portions `of said passages and said iues disposed between the stretches of said endless conveyor.

8. A muilie leer comprising side and end walls and an arch top, a leer chamber having its walls, bottom and arch composed of jointed tile sections, an arch of solid members spaced from the arch of the leer chamber and also spaced from the arch of the muiile leer and resting on the side walls of the lat.- ter, mutile passages surrounding said leer chamber, means for supplying products of combustion to the inlet ends of said passages, and ues .communicating with the outlet ends of said passages.

9. A muiiie leer comprising upright walls, an arch top and a bottom member, a leer chamber having side walls, a bottom member and an arch to al1 composed of jointed tile, the arch top avin a skew mounting on the side walls, an arc spaced above the arch of the leer chamber and spaced below the arch of the muie leer and having skew f mountin s on the side walls of the muiilc leer, mu e passages surrounding said leer chamber and having inlet portions for products of combustion, and i'lues communicating with-the outlet portions of said passages.

10. A muiile leer having upright walls, a. top and a bottom, a leer chamber located within the muille leer and spaced from the topand bottom and side walls thereof, two series of muile'passages surroundin said leer chamber, the passages of one series alternating with those of the other series, said passages having inlet portions for products of combustion, fines communicating with the outlet portions of said passages, means for regulating the passage of products of combustion through said passages combustion chambers, and burners discharging into said combustion chambers.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.

CHESTER L. SHARP. Witnesses:

Laon LANDERFELT, CARL E. REED. 

